Pentium Performance Registers: Anybody who wants to monitor performance of their Pentium via Windows 95 or 3.1 can obtain software to do it from www.intel.com. The software is P5MON.ZIP - I found it by searching for Pentium AND Counters.

The package has a far superior Help file to that provided for the same facility via Windows NT and gives a useful summary of Pentium architecture.

Monitoring is provided via a graphic display with a sampling interval of 50ms to 2 seconds. The current value is also given as a number. Two items can be monitored at the same time from the following list.

Bit(s)	Operation
0	Data Reads
1	Data Writes
2	Data TLB Misses
3	Data Read Misses
4	Data Write Misses
5	Write to E or M lines
6	Data Cache lines written back
7	Data Cache Snoops
8	Data Cache Snoop Hits
9	Memory Accesses
A	Bank Conflicts
B	Misaligned Data Accesses
C	Code Reads
D	Code TLB Misses
E	Code Cache Misses
F	Segment Register Loads
10	UNKNOWN
11	UNKNOWN
12	Branches
13	Branch Target Buffer Hits
14	Taken Branches or BTB Hits
15	Pipeline Flushes
16	Instructions Executed
17	Instructions Executed in v pipe
18	Bus Utilization
19	Pipe Stalls - Write Backups
1A	Pipe Stalls - Data Memory Reads
1B	Pipe Stalls - E/M Hits
1C	Locked Bus Cycles
1D	I/O Reads or Writes
1E	Noncacheable Memory References
1F	Address Generation Interlocks
20	UNKNOWN
21	UNKNOWN
22	Floating Point Operations
23	Breakpoint 0 matches
24	Breakpoint 1 matches
25	Breakpoint 2 matches
26	Breakpoint 3 matches
27	Hardware Interrupts
28	Data Reads or Writes
29	Data Cache Misses

(but don't ask me what they all mean) - Enjoy, Roy

For the benefit of those with Pentium MMXs, the package works with this but not for additional facilities provided for MMX measurements.

Return To Index Copyright 1994-2008 by Donald Kenney.